Look on the internet for package deals. My Quinny is over £600 in shops like mothercare and babies r us but i'm getting it for £480ish on the web
Or use craigslist or kijiji or whatever online secondhand/bargain sites you might know of.
We just used one of those sites and scored a used Quinny Buzz with all the accessories in mint condition for $300. That would be about 150 British pounds, I think. New in the store, it would have been about $1200 CAD for all of the bits and pieces and bassinets/seats etc that went with it. You can imagine that I was pretty pleased over that!
You have lots of time to search, and while you're searching, start putting a bit of money aside every now and then. If you don't find the pram you're in love with secondhand, maybe by the time you have baby, you'll have the cash saved and can buy it as a treat to yourself, guilt-free!